Fireproof door.



A. C. GODDARD.

FIRBPROOP DOOR.

APPLICATION IILBI) APR.19, 1912.

Patented June 16, 1914.

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/VVE/VTU? Alvin C. Goddard ATTORNEYS W/NESSES A. C. GODDARD. FIREPROOP DOOR. APPLICATION FILED APR.19, 1912.

Patented June 16, 1914,

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,4770HNEYS ALVIN CARROLL GODDARID, OF NEW YORK, N. Y.

FIREPROOF DOOR.

Specification of Letters Patent.

Application filed April 19, 1912. Serial No. 691,778.

To all whom it may concern.'

Be it known that I, ALVIN C. GonDARD, a citizen of the United States, and a resi dent of the city of New York, Richmond Ilill, yborough of Queens, in the county of Queens and State ofNew York, have invented a new and Improved Fireproof Door, of which the following is a full, clear, and eXact description.

The object of the invention is to provide a new and improved fireproof door which is insulated to the full size ofthe door opening and when subjected to tire is not liable to warp or disintegrate or its sections come apart even should the wooden core be reduced to charcoal. For the purpose mentioned use is made of a wooden core, wooden stile pieces, wooden rail pieces, inner and outer sheet metal coverings and inner and outer layers of asbestos or other insulating material arranged between the core and the inner sheet metal covering and between the inner and outer sheet metal coverings.

A practical embodiment of the invention is represented in the accompanying dra-wings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a perspective view of the wooden core of the door: Fig. 2 is a like view of the same showing the core covered with the inner layer of asbestos and the stile strips in position, one of the stile strips being broken out; Fig. 3 is a. like view of the saine with the inner sheet metal covering in place on the core and stile pieces, part of the covering being broken out; Fig. 4 is a similar view of the same and: showing the rails in place and a portion of the outer layer of asbestos in position; Fig. 5 is an enlarged sectional plan view of the partly finished door, the section being on the line 5 5 of Fig. 3; Fig. 6 is a face view of the lireproof door; Fig. 7 is an enlarged sectional plan View of the same on the line 7-7 of Fig. 6; Fig. 8 is a. similar view oft is made of a core A, preferably formed of tongue and groove boards fastened together, as plainly indicated in Fig. 1, and this core A is covered with a layer B of asbestos or other suitable insulating material, and on the layer B are placed stile strips C fastened to the core b v fastening devices D, preferably in the forni of nails, driven through one of the stile pieces through the core and the other stile piece to be clenched at the outer face thereof, as will be readily understood by reference to Fig. 5. lVhen this has been done the exposed faces of the stile pieces (l are covered with a layer B of asbestos or other insulating material so that the stile pieces are completely inclosed by the insulating material. An inner sheet metal covering E is applied to cover the exposed portions of the layers B and I3', the sheet metal covering having overlappingends F/ at the edges, and the top and bottoni of the door. The overlapping edges at. the sides of the door are fastened to the core A, b v nails F, as plainly shown in Figs. 3. 1 and 5. The rail pieces G of wood are now placed in position on the inner sheet metal covering E and are fastened to the core by fastening devices lil, such as nails driven through the rail pieces and the core A and the sheet metal covering E and clenched at the pointed ends, as indicated in Fig. 9. Outer layers I and I of asbestos or other suitable material are now placed on the sheet metal covered stiles and the rails Gr, as plainlyT indicated in the lower portion of Figs. 4 and 6. Outer metal coverings J in the form of caps are placed over the layers I, and outer sheet metal covings J are placed over the coverings I of the rails G, and the adjacent ends of the outer coverings J and J are interlocked with each other by double seams J2, as plainly indicated in Figs. 8 and 10. Nails or other fastening devices K are preferably employed to fasten the outer metal coverings J to the rail pieces Gr and the core A under the double seams J 2, as plainly indicated in Fig. 8, and nails K may also be used for fastening the flanges J3 of the outer coverings J in position on the stile pieces C (see Fig. 8). F langes J4 along the inner edges of the covered rail pieces'G are fastened in place on the rail pieces by nails K2, as plainly indicated in Fig. 9. After the parts of the door nave been assembled in the manner described then the Patented June 16, 1914.

usual panel moldings L arc placed in position and fastened to the core A7 in the usual manner.

From the foregoing it will be seen that by the arrangement described inner and outer layers of insulating material are used and inner and outer sheet metal coverings the inner layer of insulating material being disposed between the core and the inner sheet metalcovering while the outer layer .of insulating material is disposed between the inner and outer sheet metal coverings. By this arrangement the door is not liable to warp even if subjected to a high heat and the parts of the door are not liable to come apart even should the wooden core A be reduced tov charcoal, especially as the outer sheet metal coverings for the stile and rail pieces are locked by the double seams and the inner sheet metal covering completely incloses the core and the stile pieces.

In the modified form shown in Fig. l1 the double seam J2 is dispensed with and the outer sheet metal coverings J and J are simply provided with flanges fitting around the corresponding edges of the stile pieces and rail pieces.

In some types of doors, as shown in Fig. 12, theinsulations are omitted and the core having stiles and rails is covered by two sheets of metal E and the sides and ends are overlapped at the outer edges of the stiles and top and bottom "rails, then the split tubular coverings J in the form of caps are placed over the covered stiles and rails so that the said covered stiles and rails are incased'by the second metal coverings J thus edges of the coverings J to the stiles and rails.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A lireproof door, comprising a wooden core7 wooden stile pieces secured to the said core, inner sheet metal coverings, one for each face of the core and extending over the exposed portion of the core and over the said stile pieces, the coverings 'being provided with overlapping ends at the sides, top and bottom of the door, wooden rail pieces overlying the said sheet metal covering and secured to the same and the core, sheet metal stile caps incasing the said metal coverings at the stiles, sheet metal rail caps incasing the said rail pieces, the said caps being of split tubular form having inwardly-extending flanges fitting against the inner edges of the stiles and rails, the middle portions of the caps overlying the said overlapping sides and ends of the sheet metal coverings.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

ALVIN CARROLL GODDARD. Witnesses: GEORGE W. NELSON, J oHN P. DAVIS. 

